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wlcore: fix unsafe dereference of the wlvif

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wlvif could be passed as NULL from the wlcore_tx_work_locked()
to the wl1271_prepare_tx_frame() and to wl1271_skb_queue_head()
functions. This may lead to a Kernel panic, fix this by
validating that wlvif != NULL.

Signed-off-by: Victor Goldenshtein <victorg@ti.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
This commit is contained in:
Victor Goldenshtein 2013-09-17 18:41:25 +03:00 committed by Luciano Coelho
parent 0fe72086af
commit bf9d5d28aa
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ti/wlcore/tx.c
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@ -401,7 +401,7 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
(cipher == WLAN_CIPHER_SUITE_WEP104);
if (WARN_ON(is_wep && wlvif->default_key != idx)) {
if (WARN_ON(is_wep && wlvif && wlvif->default_key != idx)) {
ret = wl1271_set_default_wep_key(wl, wlvif, idx);
if (ret < 0)
return ret;